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Draw E-R diagrams demonstrating each of the following relationships (create three meaningful examples for each relationship): One-to-One, One-to-many, One-to-Optional Many, Optional Many-to-One, Optional Many-to-Optional Many. Show the relationships horizontally.
For each E-R diagram, state the relationship in words (for both, the forward path and the backward path).
A. Each employee is assigned to one and only one office. Each office is occupied by one and only one employee.B. Each cargo aircraft will serve from one to many distribution centers. Each distribution center is served by one and only one cargo aircraft.C. One systems analyst is assigned to anywhere from zero to many projects. Each project will be developed by one and only one systems analyst.D. One machine is undergoing anywhere from zero to one scheduled maintenance. Scheduled maintenance is being done to one and only one machine.E. Each salesperson is assigned to anywhere from one to many customers. Each customer may have from one to many salespersons.F. One home office has one to many employees. Each employee may be assigned from zero to one home office.G. Each passenger is flying to many destinations. Each destination will be visited by many passengers.
Imagine that you have been hired to fulfill their need of enhancing the data repository for their current reservation processing system. Upon reviewing the system, you find that the data structure holds redundant data and that this structure lacks..
What are the requirements to ensure the objectives of file management principle is realized?
Describe a polynomial-time algorithm to test dependency-preservation.
Prepare the relational schema for database
Practice on topic of Normalization
Consider a case that is not described above, but could happen in the business of the ABS. Please explain the case and why it might occur and based on the case you proposed, modify your design of the ABS database accordingly.
You are required to design (using an E-R diagram) an entity-relationship model of the problem, convert the model into a relational model, and assess the normal form of each schema.
What problem would you encounter if you wanted to produce a listing by city? How would you solve this problem by altering the file structure?
post a ms sql server introduction message in the week forum. enter any information that is related to ms sql server
you are the new chief information officer for acme widgets. the president of the company recently asked you what you
You have been asked to explore three database alternatives for a merchant who provides shoes to retail stores. The merchant needs the database to keep the financial records, employee records, inventory records and general use records for the busin..
primary task responsenbspwithin the discussion board area write 400-600 words that respond to the following questions
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